DE8328371U1 - SCARF BODY - Google Patents

Description

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Shell body

The invention relates to a shell body for the production of recesses and openings in cast Concrete components, which can be fastened to a ceiling or wall formwork by means of straps.

For the production of recesses and breakthroughs in concrete components it is known from DE-OS 15 59 077 to use prefabricated molded bodies in the form of hood bodies, which after the concrete has been poured and hardened non-destructively removed from the finished wall or ceiling can be. This well-known hood body is filled with sand to secure the position on the formwork Avoid moving when pouring the concrete. Apart from the fact that this well-known shell body is only can be used to produce openings in ceilings or horizontally lying components is an essential one The disadvantage to be seen in the fact that a secure position of the shell body through the sand filling is not guaranteed is because the formwork can move when the concrete is poured.

A formwork for the production of such recesses in concrete components is also known, in which from several parts assembled formwork with a conical outer shape are nailed to the ceiling or wall formwork can. However, these shell bodies are technically very complex and accordingly expensive to manufacture. Furthermore, there is the risk that liquid concrete can penetrate into the formwork and thus the desired Hollow body is not created.

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It is also known to make formwork boxes made of wood or displacement bodies for the recesses in concrete ceilings To use styrofoam, although problems can arise with regard to the possibility of floating, on the other hand, the preparation of formwork boxes made of wood is time consuming and expensive.

The object on which the invention is based is to design a shell body of the type outlined at the beginning so that that it is extremely easy to manufacture and can be made of an inexpensive material, also stored to save space and also by non-skilled workers can be plugged together to form a hollow body.

This object is achieved according to the invention in that the shell consists of a prefabricated blank made of wet-strength bound corrugated cardboard with a smooth surface, to a cuboid hollow body with four side walls and a bottom wall facing the ceiling or wall formwork is folded, and that a handle device is provided in the hollow body is formed, which is accessible from the floor opposite the top side.

Preferably, the top side is covered by a closure flap which extends from the edge of a side wall of the Hollow body extends.

The shell body is expediently formed in one piece, the blank forming the side walls of the hollow body, Includes rectangular panels connected to one another side by side via a respective folding line, on which touching side edges plug-in tabs and thus interacting and thus creating a plug-in connection

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Rvngen are provided and furthermore the handle device is formed by a section which is folded inwards around the edge of a panel and in turn is folded into a right-angled, tetrahedral body, with a surface on a bottom portion a recess is incorporated which forms a handle opening.

The tetrahedral body is preferably held in its position by means of a plug connection.

The main advantages of this inventive design of the shell body can be as follows sum up:

The design of the shell body as a one-piece punched body saves space when it lies flat and easy and economical to store. The shell is still by simply plugging it in ready for use and only needs to be nailed to the corresponding formwork. As a counter-locking trained plug connection of the shell body is arranged so that an exact and safe alignment at the edge is guaranteed and a jumping open or an automatic opening of the shell is not possible is.

Furthermore, the shell body is in the form of a before being pushed in by the handle device fitted on the inside Ring bracing secured. By removing the closing flap that covers the top and forms a lid the shell body can be pulled out after its use by pulling on the handle device. In addition, the tabs with which the scarf

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body is nailed to the formwork surface, at its winning edge perforated, so that an easy removal of the shell body is supported after its use. There only three nail tabs are provided, there is also the possibility of a combination of two shell bodies.

The invention is explained in more detail below using an exemplary embodiment with reference to the accompanying drawing.

Show in the drawing

1 shows a blank forming the shell body,

Fig. 2 is a perspective view of the plugged-together shell body, with a part of the ceiling side exposed is to show the special arrangement of the locking tab.

In Fig. 1, a blank B is shown, the first four rectangular panels forming the side walls of the shell body 9, 10, 11 and 12, which are arranged side by side and against each other along the fold lines a, b, c k'.appbar and can be plugged together. For this purpose, on one side edge of the panel 9 is a plug-in tab 13 as well a recess 16 is formed. On the corresponding side edge of the panel 12 is a recess 15 for the passage the plug-in tab 13 is provided, wherein a plug-in tab 14 can be passed through the recess 16, to create an unintentionally non-releasable plug connection.

On the lower side e of the panel 10 is a tab 4 integrally formed, which has a plug-in edge 5. In the

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In the inserted state of the blank B, the hollow body 1 shown in FIG. 2 results, with the plug-in tab the upper surface or the top side of the hollow body closes and the plug-in edge 5 against the inner surface of the rear side wall of the hollow body rests.

Around an edge d, a section B (Fig. 1) is foldable, which in turn is designed so that the bottom of the The hollow body is formed by a bottom wall 8 and is thus closed off, while that of the bottom wall 8 is adjacent Sections can each be folded against each other by 90 ° and then form a tetrahedral body, which through the Plug connection in the form of a plug tab 18 and an opening 19 is held in its position, the two the bottom wall 8 adjacent surfaces of the section B on the inner surface of each one side wall of the hollow body forming panels 9, 11 rest. A recess forms a handle opening and is from the ceiling side of the hollow body accessible when the flap U is folded up.

The formwork body can be nailed to the wall or ceiling formwork by means of tabs 6, 7a, 7b (see FIG. 1) so that the desired cavity arises when pouring concrete, care being taken that no Concrete can flow into the formwork itself.

The shell body described consists of corrugated cardboard of high quality material composition coated with wax Inner and outer surfaces and can be used in particular to create recesses in concrete ceilings in different Use strengths.

The blank shown in Fig. 1 can be produced by simple punching, with the corresponding fold lines are prepared by technically not complex measures, so that the shell body by means of less manipulation can be plugged together to form the hollow body shown in FIG.

Appropriate modifications and further developments of the described shell body can be made, but without it thereby removing from the essence of the invention.

Claims (4)

Zewawell Aktiengesellschaft & Co. KG., PWA-Verpackungswerke Sandhofer Str. 176, 6800 Mannheim 31 shell body claims 1. Formwork for the production of recesses and breakthroughs in cast concrete components, which can be fastened to a ceiling or wall formwork by means of straps, characterized in that the shell from a prefabricated blank (A) made of wet-strength bound corrugated cardboard with a smooth surface consists of a cuboid hollow body (1) with four side walls and one for ceiling or wall formwork pointing bottom wall (8) is folded, and that in the hollow body (1) a handle device is formed which is accessible from the top side opposite the bottom wall (8). ! ULASSEMBLY; * LG MUNICH I AND II. ". *. * 2USA) V3LiGn ΪΡ1Λ3 MUNICH AND BAYER 11 Il ·· «t · -2- 2. shell body according to claim 1, characterized in that the top side is covered by a closure tab (4) which extends from the edge (e) of a side wall (3) of the hollow body (1). 3. shell body according to claim 1, characterized in that it is integrally formed, that the blank (4) forming the side walls of the hollow body, on each side via a fold line (a, b, c) Side interconnected rectangular panels (9,10,11, 12) comprises, on the touching side edges Plug-in tabs (13, 14) and recesses (15, 16) that interact with them and thus create a plug-in connection are provided are, and that the handle device is formed by a portion (B) which around the edge (d) of a Panel (10) is folded inward and in turn is folded into a right-angled, tetrahedral body, wherein a recess (17) is incorporated into a bottom portion of a surface which forms a grip opening. 4. shell body according to claim 1 or 2, characterized in that the vierfläigc body is held in its position by means of a plug connection (18, 19).